简述艺术创造中雅与俗的关系。

偏二甲肼（C₂H₈N₂）是运载飞船的火箭所使用的燃料之一，该燃料发生反应的化学方程式为：C₂H₈N₂+4O₂ 

点燃  .

N₂+2X+4H₂O，其中X为______（填化学式）．

桂枝汤的组成药味是（）

A.桂枝、麻黄、杏仁、甘草、生姜

B.桂枝、芍药、生姜、大枣、人参

C.桂枝、芍药、生姜、大枣、大黄

D.桂枝、生姜、大枣、甘草、杏仁

E.桂枝、芍药、生姜、大枣、甘草

阅读理解。

     People need to relax and enjoy themse1ves．One way they can have a good time is to

watch a baseball game or another sports event．Even thousands of years ago，groups

of people gathered to watch skilled athletes（运动员）．

      Over 2000 years ago in Greece，certain days in the year were festival days．These

were holidays when people stopped work and enjoyed themselves．They liked to watch

athletes take part in  races and other games of skill．

     The most important festival was held every four years at the town of Olympia．It was

held in honor of the Greek  god Zeus（Zus）．For five days，athletes from all parts of the 

 Greek  world took part in the Olympic Games．At the Olympic Games，people could

watch them box，run，jump and so on．There was a relay race between two teams of

men in which a lighted torch（火矩）was passed from runner to runner．The Olympic

Games were thought to be so important that cities which were at war with one another had

to stop fighting．People were allowed to travel to the games safely．Thousands of people

came to Olympia from cities in Greece and from her colonies（殖民地）in Africa，Asia

and Italy．They met as friends to cheer their favorite athletes and to enjoy themselves．

 1．What happened in Greece over 2000 years ago？______

A．People stopped work and enjoyed themselves．

B．The cities there were often against one another．

C．People watched baseball games．

D．People didn’t go to any games at all．

 2．What were those countries in Africa？_____

A．Friends．    

B．Enemies．

C．Colonies．    

D．Other cities．

3．What did people do at the games？______

A．They fought．       

B．They just talked to friends．

C．They cheered for good athletes．  

D．They tried to find friends．

4．Greek cities then were fighting so they_____．

A．were weak                  

B．were strong

C．couldn’t go to other cities freely  

D．could see each other

5．The best title for the story is“_____”．

A．Greece at War      

B．Together for the Games

C．Stop Fighting            

D．Sport

引起角膜浑浊的沙眼后遗症和并发症中，不包括（）

A.上睑下垂

B.上皮性角膜炎

C.睑内翻及倒睫

D.角膜血管翳末端浸润

E.实质性结膜干燥症

1988年，我国首次以( )方式发行国债。

A．行政分配
B．公开招标
C．承购包销
D．通过商业银行和邮政储蓄柜台销售